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Use switch instead of if/else chain for 686 model identification.

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Add precise model identification for 586-family CPUs.
This commit is contained in:
Dag-Erling Smørgrav 1998-05-22 22:15:14 +00:00
parent 7e15fd7974
commit 627d8c5f42
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=36303
2 changed files with 82 additions and 16 deletions
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49
sys/amd64/amd64/identcpu.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* from: Id: machdep.c,v 1.193 1996/06/18 01:22:04 bde Exp
* $Id: identcpu.c,v 1.46 1998/05/19 19:40:45 peter Exp $
* $Id: identcpu.c,v 1.47 1998/05/21 22:53:24 des Exp $
*/
#include "opt_cpu.h"
@ -144,7 +144,34 @@ printcpuinfo(void)
strcat(cpu_model, "i486 ");
break;
case 0x500:
strcat(cpu_model, "Pentium"); /* nb no space */
/* Check the particular flavor of 586 */
strcat(cpu_model, "Pentium");
switch (cpu_id & 0xf0) {
case 0x00:
strcat(cpu_model, " A-step");
break;
case 0x10:
strcat(cpu_model, "/P5");
break;
case 0x20:
strcat(cpu_model, "/P54C");
break;
case 0x30:
strcat(cpu_model, "/P54T Overdrive");
break;
case 0x40:
strcat(cpu_model, "/P55C");
break;
case 0x70:
strcat(cpu_model, "/P54C");
break;
case 0x80:
strcat(cpu_model, "/P55C (quarter-micron)");
break;
default:
/* nothing */
break;
}
#if defined(I586_CPU) && !defined(NO_F00F_HACK)
/*
* XXX - If/when Intel fixes the bug, this
@ -156,19 +183,25 @@ printcpuinfo(void)
break;
case 0x600:
/* Check the particular flavor of 686 */
if ((cpu_id & 0xf0) == 0x00)
switch (cpu_id & 0xf0) {
case 0x00:
strcat(cpu_model, "Pentium Pro A-step");
else if ((cpu_id & 0xf0) == 0x10)
break;
case 0x10:
strcat(cpu_model, "Pentium Pro");
else if ((cpu_id & 0xf0) == 0x30) {
break;
case 0x30:
strcat(cpu_model, "Pentium II");
cpu = CPU_PII;
}
else if ((cpu_id & 0xf0) == 0x50) {
break;
case 0x50:
strcat(cpu_model, "Pentium II (quarter-micron)");
cpu = CPU_PII;
break;
default:
strcat(cpu_model, "Unknown 80686");
break;
}
else strcat(cpu_model, "Unknown 80686");
break;
default:
strcat(cpu_model, "unknown");

49
sys/i386/i386/identcpu.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* from: Id: machdep.c,v 1.193 1996/06/18 01:22:04 bde Exp
* $Id: identcpu.c,v 1.46 1998/05/19 19:40:45 peter Exp $
* $Id: identcpu.c,v 1.47 1998/05/21 22:53:24 des Exp $
*/
#include "opt_cpu.h"
@ -144,7 +144,34 @@ printcpuinfo(void)
strcat(cpu_model, "i486 ");
break;
case 0x500:
strcat(cpu_model, "Pentium"); /* nb no space */
/* Check the particular flavor of 586 */
strcat(cpu_model, "Pentium");
switch (cpu_id & 0xf0) {
case 0x00:
strcat(cpu_model, " A-step");
break;
case 0x10:
strcat(cpu_model, "/P5");
break;
case 0x20:
strcat(cpu_model, "/P54C");
break;
case 0x30:
strcat(cpu_model, "/P54T Overdrive");
break;
case 0x40:
strcat(cpu_model, "/P55C");
break;
case 0x70:
strcat(cpu_model, "/P54C");
break;
case 0x80:
strcat(cpu_model, "/P55C (quarter-micron)");
break;
default:
/* nothing */
break;
}
#if defined(I586_CPU) && !defined(NO_F00F_HACK)
/*
* XXX - If/when Intel fixes the bug, this
@ -156,19 +183,25 @@ printcpuinfo(void)
break;
case 0x600:
/* Check the particular flavor of 686 */
if ((cpu_id & 0xf0) == 0x00)
switch (cpu_id & 0xf0) {
case 0x00:
strcat(cpu_model, "Pentium Pro A-step");
else if ((cpu_id & 0xf0) == 0x10)
break;
case 0x10:
strcat(cpu_model, "Pentium Pro");
else if ((cpu_id & 0xf0) == 0x30) {
break;
case 0x30:
strcat(cpu_model, "Pentium II");
cpu = CPU_PII;
}
else if ((cpu_id & 0xf0) == 0x50) {
break;
case 0x50:
strcat(cpu_model, "Pentium II (quarter-micron)");
cpu = CPU_PII;
break;
default:
strcat(cpu_model, "Unknown 80686");
break;
}
else strcat(cpu_model, "Unknown 80686");
break;
default:
strcat(cpu_model, "unknown");